Buick Regal: Diagnostic Information and Procedures

 DTC B3924-B3928

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DT

 Diagnostic Information and Procedures

SYMPTOMS - POWER TRANSFER UNIT CASE Strategy Based Diagnostics Review the system operations in order to familiarize yourself with the system functions. Refer to Power Transfer Unit Case Disassembled View, Power Transfer Unit Case Description and Operation, and Rear Drive Axle Description and Opera